YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 22.90 | b | 22.90 | k |
1986 | 25.90 | b | 25.09 | 34.48 | 38.38 | 42.90 | 55.88 | 58.48 | a | 56.97 | 48.04 | c | 36.53 | b | 28.20 | 18.45 | c | 39.11 | ||||||||
1987 | 18.21 | 23.59 | 25.82 | 36.83 | 47.82 | a | 54.35 | 59.31 | b | 55.91 | b | 47.40 | a | 39.74 | 26.28 | 17.60 | a | 37.74 | ||||||||
1988 | 15.64 | c | 20.97 | 23.77 | 35.97 | a | 44.71 | 58.29 | b | 59.70 | f | 56.98 | a | 47.79 | a | 42.37 | 27.97 | a | 18.70 | a | 35.74 | a | ||||
1989 | 20.02 | c | 13.94 | a | 31.43 | a | 37.57 | 44.68 | 51.20 | 60.24 | b | 56.54 | c | 48.16 | a | 38.39 | 30.57 | 18.42 | 37.60 | |||||||
1990 | 23.21 | c | 20.83 | a | 29.55 | 37.97 | 41.92 | a | 55.95 | a | 58.14 | b | 55.72 | a | 51.90 | 39.95 | a | 31.23 | 15.19 | 38.46 | ||||||
1991 | 18.73 | c | 26.22 | a | 29.29 | e | 34.63 | 44.17 | a | 54.32 | 58.32 | 57.18 | 48.52 | b | 38.55 | 25.72 | a | 21.59 | c | 38.10 | ||||||
1992 | 18.38 | a | 25.88 | a | 30.30 | a | 40.02 | 46.98 | b | 51.88 | a | 57.28 | b | 56.59 | c | 51.17 | c | 42.14 | b | 23.00 | c | 19.57 | b | 38.60 | ||
1993 | 20.32 | 17.19 | b | 29.97 | a | 35.03 | a | 46.09 | b | 52.47 | 56.74 | b | 56.07 | a | 48.00 | c | 39.26 | b | 23.84 | a | 21.57 | d | 37.21 | |||
1994 | 23.38 | a | 20.41 | 30.71 | 36.54 | c | 48.31 | 57.69 | a | 59.63 | a | 59.17 | a | 50.38 | a | 39.05 | 26.79 | b | 25.37 | 39.79 | ||||||
1995 | 19.85 | 28.00 | 31.07 | b | 35.10 | a | 41.36 | b | 52.55 | 58.26 | b | 60.26 | 50.20 | 39.45 | c | 33.79 | a | 24.27 | a | 39.51 | ||||||
1996 | 19.56 | 23.06 | b | 27.80 | a | 36.33 | a | 47.32 | 54.87 | 60.79 | c | 57.45 | 48.27 | 39.92 | 31.61 | b | 22.52 | 39.12 | ||||||||
1997 | 19.19 | 19.93 | 32.16 | 31.62 | 45.26 | 56.03 | 59.67 | a | 58.31 | 53.63 | 39.53 | 25.75 | 18.23 | a | 38.28 | |||||||||||
1998 | 24.40 | a | 23.90 | c | 26.03 | b | 34.15 | 46.73 | 50.89 | b | 63.03 | 58.10 | 53.41 | a | 39.20 | a | 33.78 | 18.73 | 39.36 | |||||||
1999 | 23.71 | 26.98 | a | 32.23 | a | 32.62 | a | 43.76 | 53.53 | 62.41 | b | 58.68 | 47.16 | a | 39.47 | b | 33.32 | 21.77 | a | 39.64 | ||||||
2000 | 23.81 | 28.60 | 31.03 | 39.18 | 48.55 | 54.86 | a | 62.16 | b | 61.38 | b | 51.02 | 40.00 | 19.12 | 18.48 | c | 39.85 | |||||||||
2001 | 18.11 | 23.59 | a | 29.52 | a | 38.52 | a | 47.43 | a | 56.15 | c | 63.82 | 60.34 | b | 51.83 | a | 41.57 | b | 30.73 | 21.05 | 40.22 | |||||
2002 | 19.47 | 18.65 | a | 24.11 | 40.18 | b | 44.74 | 57.66 | b | 63.90 | 57.73 | 51.22 | a | 35.39 | 26.33 | 23.63 | a | 38.58 | ||||||||
2003 | 29.35 | 19.17 | a | 28.46 | e | 38.91 | b | 46.52 | b | 52.71 | b | 63.18 | a | 60.63 | 48.40 | 43.85 | 27.07 | 23.22 | a | 40.12 | ||||||
2004 | 22.06 | 19.86 | a | 34.74 | 38.33 | a | 47.18 | 53.20 | 58.42 | 55.44 | 50.28 | a | 41.98 | 27.92 | 23.85 | 39.44 | ||||||||||
2005 | 27.63 | a | 22.28 | a | 29.84 | 37.53 | 44.89 | 53.55 | a | 61.60 | a | 57.45 | 51.17 | 43.08 | 30.93 | 19.82 | 39.98 | |||||||||
2006 | 23.74 | 20.63 | a | 25.71 | 40.68 | 47.27 | a | 57.57 | 64.21 | 59.00 | 46.25 | 37.21 | 31.40 | 18.26 | 39.33 | |||||||||||
2007 | 11.97 | 25.14 | 32.78 | a | 37.02 | 46.74 | 54.88 | 62.94 | 61.29 | 53.30 | 41.82 | 32.72 | 18.05 | 39.89 | ||||||||||||
2008 | 16.05 | a | 20.16 | 25.21 | 32.83 | 44.24 | 53.02 | 60.74 | 58.45 | 49.30 | 39.89 | 33.75 | 20.52 | 37.85 | ||||||||||||
2009 | 23.19 | 26.98 | 31.48 | 34.45 | 48.03 | 53.03 | 58.37 | 55.94 | 50.45 | 34.76 | 29.48 | 13.45 | 38.30 | |||||||||||||
2010 | 18.94 | 13.86 | 26.61 | d | 36.52 | c | 42.20 | a | 54.57 | a | 61.15 | 58.41 | b | 51.41 | a | 42.98 | 29.40 | d | 24.18 | c | 38.35 | |||||
2011 | 20.18 | 15.31 | a | 30.92 | 36.28 | 41.87 | a | 53.11 | g | 62.73 | a | 61.13 | a | 50.70 | b | 40.29 | b | 28.48 | 16.68 | a | 36.78 | a | ||||
2012 | 23.58 | 16.88 | 35.35 | 41.30 | 47.44 | 59.69 | c | 64.18 | f | 60.50 | g | 51.88 | a | 41.20 | a | 40.15 | m | 22.56 | f | 39.66 | d | |||||
2013 | 17.15 | 19.04 | 28.36 | b | 30.50 | a | 45.71 | 56.67 | a | 61.72 | b | 60.48 | 54.88 | 36.04 | e | 29.48 | f | 19.58 | a | 39.10 | a | |||||
2014 | 21.55 | a | 22.17 | a | 31.03 | a | 35.64 | a | 43.73 | a | 53.60 | d | 60.64 | c | 56.65 | a | 52.73 | 43.48 | c | 27.85 | d | 21.50 | a | 39.21 | ||
2015 | 24.79 | 25.20 | 32.62 | c | 37.23 | h | 43.73 | e | 56.82 | k | 58.06 | g | 57.75 | c | 53.74 | c | 46.31 | d | 27.50 | g | 19.73 | c | 37.99 | d | ||
2016 | 18.68 | 27.41 | b | 30.15 | a | 35.67 | 42.94 | 57.36 | a | 60.39 | 56.90 | a | 51.02 | 44.02 | 33.48 | 19.48 | 39.79 | |||||||||
2017 | 16.53 | 29.66 | 36.85 | 36.30 | 44.45 | 56.57 | 61.42 | 56.47 | 50.15 | 37.61 | 36.45 | 24.34 | 40.57 | |||||||||||||
2018 | 26.13 | 23.30 | 29.92 | 38.02 | 47.61 | 56.13 | k | 61.28 | a | 56.30 | p | 52.39 | g | 42.91 | t | ----- | z | ----- | z | 37.71 | f | |||||
2019 | ----- | z | ----- | z | ----- | z | 43.00 | y | 41.52 | 53.52 | 62.13 | 60.93 | a | 54.58 | 34.17 | b | 33.14 | s | ----- | z | 51.14 | f | ||||
2020 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 21.01 | 22.24 | 29.98 | 36.58 | 45.26 | 54.79 | 60.75 | 58.13 | 50.56 | 39.98 | 29.21 | 20.33 | 39.04 | |||||||||||||
S.D. | 3.77 | 4.19 | 3.17 | 2.57 | 2.16 | 2.21 | 2.07 | 1.83 | 2.27 | 2.82 | 3.83 | 2.83 | 0.90 | |||||||||||||
SKEW | 0.03 | -0.23 | -0.06 | -0.36 | -0.25 | 0.25 | -0.14 | 0.42 | 0.05 | -0.08 | -0.44 | -0.21 | -0.30 | |||||||||||||
MAX | 29.35 | 29.66 | 36.85 | 41.30 | 48.55 | 59.69 | 64.21 | 61.38 | 54.88 | 46.31 | 36.45 | 25.37 | 40.57 | |||||||||||||
MIN | 11.97 | 13.86 | 23.77 | 30.50 | 41.36 | 50.89 | 56.74 | 55.44 | 46.25 | 34.17 | 19.12 | 13.45 | 37.21 | |||||||||||||
YRS | 33 | 33 | 33 | 32 | 34 | 31 | 31 | 32 | 33 | 33 | 29 | 32 | 27 |